"He really kind of stabbed us in the back", Kudlow said.
It follows a chaotic G7 summit in Quebec at the weekend, when USA president Donald Trump withdrew his endorsement of a joint communique, accusing Mr Trudeau of being "dishonest and weak". And what did Trudeau do as soon as the plane took off from Canadian airspace?
"He did him a favor", Navarro said. "President Trump is creating chaos. That will not stand".
Tensions between the two allies increased following the Group of Seven summit in Quebec this weekend, when Trump met with leaders of Canada, Britain, Italy, France, Germany and Japan to discuss economic issues facing the nations, including trade relations.
Trudeau's remarks prompted Trump to pull out of a joint communique that was a fragile consensus on the trade dispute between Washington and its top allies, Kudlow said.
Navarro called Trudeau's comments "nothing short of an attack on our political system".
Trump's Economic Adviser Larry Kudlow Slams Trudeau Before N. Korea Meeting
The Canadian leader pulled a "sophomoric political stunt for domestic consumption", Kudlow said, that amounted to "a betrayal ". Kudlow, in a separate TV appearance, said Trudeau was "polarizing" and "really kind of stabbed us in the back".
"It's a betrayal. It's essentially double-crossing".
But Trump appeared to take Trudeau's criticism personally, and denounced the prime minister hours after he departed the G7 summit on Saturday.
But Trump remains firm in his determination to apply tariffs in a situation he believes is unfair to America's economy.
The White House advisers may be laying the groundwork to blame Trudeau if the meeting with the North Korean leader is unsuccessful.
Canadian Foreign Minister Chrystia Freeland said on Sunday in response to questions about Kudlow and Navarro's comments that she is thankful she is "not responsible for explaining the reasoning behind any comments made by the officials of any foreign government". The only G7 country that did not contribute was the U.S.
In a tweet posted Saturday evening, Trump said his decision to rescind support for the statement was based on "false statements" made by Trudeau during a press conference he gave, as well as "the fact that Canada is charging massive Tariffs" on US companies.
"Canada's Conservatives continue to support the Prime Minister's efforts to make the case for free trade", he added.
Kudlow warned Trump would push back.
"If you attack this president, he's going to fight back", Kudlow added. "That was part of Trudeau's mistake". So, I ask you: "He gets up in the airplane and leaves, and then Trudeau starts blasting him at a domestic news conference?".